Pump



July 4, 1933;. v H. FELDMEIER E'vr`AL 1,916,756

PUMP

FiledvJ-a'n. 1o, 1930 2 sheets-sheet 1 www In! Q 22 I CA/ .QII l J i ii, l

July 4, 1933 H. FELDMEu-:R ET AL 1,916,756

' PUMP Filed Jan. 1o, 1930 zsneets-sneet :al

f, A WN Patented July 4, 1933 UNIT-ED 4srivrlazs PATENT OFFICE FELDMEIER AND ROLAN JAY WIGHTMAN, LITTLE FALLS, NEW YORK, .ASSIGNORS TO CHERRY-BURRELL CORPORATION, OF LITTLE FALLS, NEW YORK PUMP Application led January 10, 1930. Serial No. 419,797.

This invention relates to pumps and more partlcularly to improvements 1n pumps adapted for pumping liquids such as milk,

in which it is important that the pump shall be constructed so that it can be readily cleaned and kept always in a thoroughly1 sanitary condition.

One object of the invention is to provide an eflcient and desirable pump of novel construction adapting the parts with which the pumped liquid contacts to be readily separated so as to permit easy and thorough cleaning and inspection of the parts.

Other objects are to provide a pump in which the cylinder with its attached liquid connections or fittings can be quickly and easily removed as a unit; in which means are provided for ysupporting the weight of the cylinder and attached parts and relieving the piston and piston rod from strain due to misalinement caused by these weights, both during the operation of the pump and when the cylinder is being removed and replaced, and which guides and correctly locates or centers the cylinder with respect to the piston and stationary cylinder head when replacing the cylinder; in which the inner or rear head of the cylinder is readily separable from the supporting frame to facilitate cleaning and to aiford access to the stutling box or packing gland for the piston rod.

A further objectief the invention is to im-` prove pumps in various respects as hereinafter described and set forth in the claims.

In the accompanying drawings: Fig. 1 is a side elevation on a reduced scale, of a pump exemplifying a practical embodiment of our invention.

Fig. 2 is a fragmentary` longitudinal` sectional elevation. of the pump.

Fig. 3 is a transverse., sectional elevation on lille 3 3, Fig. (i, showing the inner cylinder head and its support.

Fig. -l is a fragmentary, longitudinal, sectional elevat-ion of the pump, the cylinder and attached fittings being removed.

Fig. 5 is a longitudinal, sectional elevation of the cylinder assembly removed -from its support.

Fig. is a. view similar to Fig. et, showing the inner cylinder head released and moved forwardly on the. piston rod.

Fig. 7 is a transverse. sectional elevation of the pump on line. If-7. Fig. 2.

l0 represents the cylinder and ll the pis-l ton of the pump, which is a double-acting reciprocating pump. The piston is secured on the outer' end of a piston rod 12 which is arranged to reciprocate and is suitably guided in a stationary frame 13. vrlhe piston may be reciprocated by any usual lor suitable driving means, as for example, by connecting the piston rod with the piston of a steam engine or by operatively connecting the piston rod to an electric motor, both types of drives being well known. In the pump illus- Y trated, the piston rod is'connected by drive mechanism, guet shown), enclosed within a housing 1-1, orinmg part of the stationary vframe, and operatively connected to an electhat it lcan be readily detached and slid forward on the piston rod to facilitate thorough cleaning of the head and for adjusting the gland or renewing the packing. As shown, the head 1T is provided at its inner end with an inwardly directed"cylindrical face 20 having a slip tit on a cylindrical shoulder or projection 20a on the outer end of the frame 13, and the head is secured tothe frame by a bayonet joint consisting of a hook 21 on the head adapted to engage with a headed screw or stud :2:2 projecting from the outer end of the frame 13. By turning the cylinder head v 1T slight-ly about the piston rod, the hook will be disengaged from the screw, when the head 17 can be moved `forwardly on the piston rod away from the frame 13, as shown in Fig. 6 The stulling box is then accessible for adjustment or renewal of the packing. '.lo secure th' head on the frame 13 it is only necessary to slip the head onto the projection :20a on ,the frame 13 andy turn the head to engage the hook with the screw 22. When the head is released and moved away from the frame 18, all parts of th'e head are accessible for cleaning.

The outer cylinder head 18 is clamped against the outer end of the cylinder body by a U-shaped clamping yoke 23, the legs oi titl ends of the cylinder body and the heads 17y and 18 by packing gaskets 25 which are preferably flat paper gaskets and are alike. These` flat paper gaskets are inexpensive and can he discarded and replaced by new gaskets after each run or use Aof the pump, and the gaskets being relatively thin and of uniform thickness, insure accurate alinement of the parts and avoid the objection to the usual and more expensive gaskets of rubber or the like which are thicker and often tend to throw the parts out of alinement, and cause a bindinfr or friction between the piston and the cy inder. v

The cylinder is supported from the stationary frame 13 preferably by a rigid shaft 26 which is rigidly secured in a socket 2T in the frame, and extends forwardly from the frame through a guide hole 2S in a lug on the top of`the,cylinder body 16. The cylinder is adapted to slide upon this supporting shaft 26 in removing and replacing the cylinder. The shaft supports the weight of the cylinder and its attached parts. thus relieving the piston and piston rod of this weight, and it guides the cylinder in they movements thereof to secure the cylinder in place and remove it from the stationary frame. 1When the clamping yoke 23 is released and swung from in front of the cyl` inder, the cylinder is freely supported on the shaft 26 and can be slid thereon outwardly away from the inner cylinder head l? and od' of the piston 11. ,The shaft 9.6 is preferably long enough to support the cylinder when it is clear of the piston and it thus serves as a means for guiding the cylinder onto the piston as well as into connection with the inner head when securing the cylinder in place.

An inlet and an out-let valve are provided at each end ot the cylinder, the two inlet valves 3G being arranged at one side ot the cylinder and the two outlet valves 31 at the opposite side of the cylinder. Preferably each valve comprises a valve casing 3:2 and a poppet valve disk 33 within the casing and adapted to be pressed hy a spring surrounds ing the stem of the disk against an internal seat in the valve casing. 'lhe stein is guided' in a hole in a spider 3l: which is removable with the disk 33 and spring from the casing` to facilitate cleaning. The four valves are alike but the casings of the inlet valves 30 are secured to the cylinder so that the inlet valves will open inwardly while the casings of the outlet valves 31 are reversed or secured at their opposite ends to the cylinder so that the outlet valves will open outwardly or away from the cylinder. As shown, the casing of each valve is provided at one end with a ni ple 35 and at the other end with a screw tiread to receive a screw coupling ring 36. In the case ofy thel outlet valves the nipple 35 is st-ationarilv secured in a tubular boss 3T on the cylinder and the threaded end of the casing is connected by the coupling'ring 36 to a coupling tube 38' which is stationarily secured in an outlet T- fitting 39, whereas in the case of the inlet valves the coupling tube 38 thereof is stationarily secured in a second tubular boss 3T on the cylinder and the nipple 35 of the casing is secured in another inlet T-fitting 39. The two outlet Ts 39 are joined by an interposed pipe section 40 and one outlet T is connected b v a union l1 to an outlet or discharge pipe l2 extending lengthwise at one side of and above the cylinder 10. The two inlet T`s 39-are joined by an interposed fitting 43. andthe outer T is connected by a union 14 to an inlet or .supply pipe 45 arranged lengthwise at the opposite side of and above the cylinder. The inner ends of the other inlet and outlet T's may be closed by suitable screw caps 46. Thus the inlet and outlet connections, including thevalves, extend in the form of a V, preferably at an angle of 90 degrees to each other, upwardly and outwardly from the cylinder, and the valves and inlet and out-let pipes and connections are therefore conveniently disposed where they are readily accessible above the lpump cylinder.

lWhen it is desired to separate the parts of the pump for cleaning. the inlet and outlet pipes 42 and 45 are disconnected at the unions t1 and 44 and the yoke clamp 23 is released. The outer cylinder head can then be removed and the cylinder body with the attached valves and littings can then be pulled forwardly as a unit od of the supporting shaft 26, leaving the inner head 17 in place on the stationary frame. Then the inlet and outlet Ts can be disconnected and the valve casings opened by unscrewing the coupling rings 36, and since the valve disks and their supporting spiders can then be removed from the .valve casings, all of the parts are opened up and made accessible, thus permitting the ready and thorough cleaning and inspection thereof.

50 represents the air chamber of the pump. ln the construction shown in the drawings, this chamber is formed b a cylindrical receptacle having an open, lower end secured to the pipe fitting 43, which is located between and joins the two inlet Ts 39. The air chamber receptacle is clamped to the fitting 43 by suitable means, such as thumb nuts 51 engaging screws secured to the lower end of the air receptacle at its opposite sides and adapted to pass through perforated lugs 52 on opposite sides of the pipe fitting 43. A packing gasket 53 is employed between the lower end of the receptacle and a circular seat on the pipe fitting 43. This gasket is preferably a flat paper gasket of the same size as t-he gaskets 25 employed for the cylinder heads so that like gaskets can be used for both of the cylinder heads and for the air chamber. Since the joint between'the air chamber and its sanitary fitting 43 is at the bottom of the chamber, it is submerged in the liquid so that there is not the chance for escape of air that there would be if the joint were at the top. While the air chamber is shown as being connected in the inlet line between the inlet Ts, its sanitary base fitting 43 could be-similarly located in the outlet line between the outlet Ts 37, or if desired, the fitting or base 43 of the air chamber could be connected outside of the Ts 39 on either the suction or dischargeV side.

We claim as our invention:

l. In a liquid pump, the combination with a cylinder and a piston supported independently of the cylinder and arranged to reciprocate therein, said cylinder having an inner head and a body separable therefrom of a support on which said cylinder body is mounted and slidable parallel with the axis of the piston for removal from the piston, said support being arrangedto guide said cylinder body in its sliding movements both horizontally and vertically, and said piston being retained in operative position by its support when the cylinder is removed.

2. In a liquid pump, the combination with a horizontal cylinder and piston supported independently of the cylinder and arranged `to reciprocate therein, said cylinder having a stationarily mounted inner head and a body separable therefrom of a stationary overhead support'on which said cylinder body is slidably suspended to move parallel with the axis of the piston away from said head for removal from the piston, said support being arranged to guide said cylinder in its sliding movements both vertically and horizontally, and said piston being retained in operative position by its support when the lcylinder is removed.

3. In a liquid pump, the combination with a cylinder and a piston supported independently of the cylinder and arranged to reciprocate therein, said cylinder having an inner head and a body separable therefrom, of a frame on which said inner head is secured, a

stationary supporting shaft projecting from said frame parallel with the axis of said piston, said cylinder body having a part slidably engaging said shaft whereby the cylinder is supported by and adapted to slide on s aid shaft toward and from said frameand inner head in placing the cylinder body over and removing it from the piston and .is guided by said shaft parallel with the axis of said piston both vertically and horizontally, and said piston being retained in operative position by its support when the cylinder is removed.

4. In a liquid pump, the combination with a stationary horizontal cylinder and a piston arranged to reciprocate therein, of a piston rod carrying said piston, a stationary frame in which said piston rod reciprocates and is guided to support the piston independently of the cylinder, and an overhead shaft fixed to and projecting outwardly from said frame parallel with said piston rod, said cylinder having a guide slidably engaging said shaft for guiding the cylinder parallel with said piston rod toward and from said stationary frame, and supporting the cylinder when removing it from and engaging it with the piston. y

5. In a liquid pump, the combination with a cylinder and a piston arranged to reciprocate therein, said cylinder having an inner head and a body separable therefrom of a piston rod carrying said piston, a stationary frame in which said piston rod reciprocates,

and a shaft fixed to and projecting from said frame parallel with said piston rod, said cylinder body having a guide slidably engaging said shaft for supporting and guiding the cylinder body parallel with said piston rod toward and from said stationary frame for removal of the cylinder from the piston, said shaft projecting suiciently beyond said piston to support said cylinder body when l the latter has been pulled clear of said piston.

6. In a liquid pump, the combination with a cylinder and a piston supported independently of the cylinder and arranged to reciprocate therein, said cylinder having a head at one end separable from the cylinder body, of a support independent of the cylinder to which tion by its vsupport when the cylinder is remove HARVEY FELDMEIER. ROLAN JAY WIGHTMAN. 

